Stair for a swimming pool



FIG. 1 is a top plan view of a stair for a swimming pool;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a stair for a swimming pool, substantially as shown and described. 